The IMA.01 Iridium Marine antenna is a high performance, durable, bracket mount antenna which is designed for applications using the IridiumŪ Satellite Communication system. The durable IP67 rated housing and bracket mount makes the IMA.01 the ideal solution for permanent marine installations. The antenna exhibits excellent efficiency, greater than 65% with the standard 1.0 meter CFD-200 coaxial cable. IridiumŪ has certified the IMA.01 antenna for commercial use in connection with the Iridium Communications System. Iridium Satellite LLC is the owner of IridiumŪ and all other Iridium trademarks, service marks, and logos contained herein. The IMA.01 antenna is designed for free air operation, thus no ground plane is required.